From: Kentaro Motohara (kmotohara@ioa.s.u-tokyo.ac.jp)
Date: Mon Nov 18 2002 - 05:42:46 PST
Dear all,
We have finished tonight's CISCO observation.
Total exposure time for SN-017 is 5.5hrs.
However,
# the seeing got worse, and it was 0.6-0.7" for most of the frames.
# most of the time, stray light from the Moon fell on the focal plane,
and they are almost useless(or, very hard to remove them)....
So for tonight, effective data is
"2 hour exposure with 0.7" seeing"
.
I just have done quick reduction and put gaussian smoothed
image at
http://www.ioa.s.u-tokyo.ac.jp/~kmotohara/sn017.gif
.
Can you find it?
The answer is at
http://www.ioa.s.u-tokyo.ac.jp/~kmotohara/sn017.pdf
.
S/N looks very bad, like 3, which is less than half of
the expected value(7).
I think this is due to scattered moon-light at lower level,
and also to the bad seeing(~0.7").
I hope we can get better condition (both moonlight and seeing)
tomorrow.
Cheers,
Kentaro
-------------------------------------------------------------
Kentaro Motohara
Research Associate
Institute of Astronomy, University of Tokyo
2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
kmotohara@ioa.s.u-tokyo.ac.jp
Tel: +1-81-422-34-5049 Fax: +1-81-422-34-5041
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